Register for a new account on Friday, March 6, 2026 with the BetMGM Massachusetts bonus code TOPACTION to take advantage of a $1,500 first bet promo. Place your first bet on any event, including Mavericks vs. Celtics at 7 p.m. ET on ESPN, and get back up to $1,500 in bonus bets if your wager loses. The BetMGM bonus code TOPACTION is available to new users in Massachusetts plus AZ, CO, DC, IA, IL, IN, LA, KS, KY, MD, MI, NC, NJ, OH, PA, TN, VA, WV, and WY.'
Keep in mind that any bonus bets you receive with the BetMGM promo expire after seven days. If your bonus amount exceeds $50, you receive five equal bonus bet credits.
BetMGM Massachusetts Bonus Code TOPACTION: Grab $1,500 First Bet for Mavericks vs. Celtics
Sign up for a new account with the BetMGM Massachusetts bonus code TOPACTION to claim a $1,500 first bet promo to wager on the Boston Celtics tonight at 7 p.m. ET on ESPN. Let's take a look at a betting example from Mavericks vs. Celtics to demonstrate how this BetMGM promo works.
Suppose I place a $500 first bet on the Celtics -10.5 (-110) vs. the Dallas Mavericks:
- If the bet wins, I receive $454.54 in profit and my $500 stake back.
- If the bet loses, I receive five $100 bonus bets that expire after seven days.
Other BetMGM Bonus Code Offers Available Now
Outside of the first bet offer, there are two welcome bonuses available to choose from at BetMGM Sportsbook. When you sign up with the BetMGM bonus code TOPTAN1500, you receive a 20% deposit match of up to $1,500 in sports bonus that has a 10x rollover requirement. Alternatively, use the BetMGM bonus code ACTIONGET to claim a $150 bet-and-get promo.
Check out the chart below for more information about BetMGM promo available to new users today.
| BetMGM Promo | States Available | BetMGM Bonus Code |
|---|---|---|
| Get a 20% First Deposit Match up to $1,500 in Sports Bonus | AZ, CO, DC, IA, IN, KS, KY, MA, MD, MI, MO, NC, NJ, PA, TN, WV, WY | TOPTAN1500 |
| Bet $10, Get $150 in Bonus Bets if You Win | MI, NJ, PA, WV | ACTIONGET |
BetMGM Bonus Code Sign-Up Steps: Friday, March 6, 2026
Follow the steps outlined below to claim your sign-up bonus today with the BetMGM bonus code:
- Click any sign-up module on this page to create a new BetMGM Sportsbook account. Forthe $150 bet-and-get, use ACTIONGET. To claim the 20% deposit match, it's the exclusive TOPTAN1500. The $1,500 first bet offer usesTOPACTION.
- Once redirected, select your state and click "Register" in the top right corner to begin registration.
- Enter your personal information, including your email address, name, date of birth, phone number, home address, and the last four digits of your SSN. Then, create a user ID and password.
- Accept the BetMGM terms & conditions, set security questions, and confirm your age and eligibility.
- Make a $10+ first deposit using any available banking method.
- Place your first bet via the BetMGM app or site on any event, including Mavericks vs. Celtics NBA.
BetMGM Sportsbook Terms & Conditions
21+. Gambling problem? Call 1-800-GAMBLER or 1-800-MY-RESET. AZ, CO, DC, IA, IL, IN, LA, KS, KY, MA, MD, MI, NC, NJ, OH, PA, TN, VA, WV, WY. Call 877-8-HOPENY or text HOPENY (467369) (NY). Call 1-800-327-5050 (MA), 1-800-BETS-OFF (IA), 1-800-981-0023 (PR). Please Gamble Responsibly. Call 1-800-NEXT-STEP (AZ), 1-800-522-4700 (KS, NV), 1-800-BETS-OFF (IA). First Bet Offer for new customers only (if applicable). Subject to eligibility requirements. Bonus bets are non-withdrawable. In partnership with Kansas Crossing Casino and Hotel. This promotional offer is not available in DC, MS, NY, NV, ON, or PR. Visit BetMGM.com for Terms & Conditions.
21+. Gambling problem? Call 1-800-GAMBLER or 1-800-MY-RESET. AZ, CO, DC, IA, IN, KS, KY, MA, MD, MI, MO, NC, NJ, PA, TN, WV, WY. Call 877-8-HOPENY or text HOPENY (467369) (NY). Call 1-800-327-5050 (MA), 1-800-BETS-OFF (IA), 1-800-981-0023 (PR). Please Gamble Responsibly. Call 1-800-NEXT-STEP (AZ), 1-800-522-4700 (KS, NV), 1-800-BETS-OFF (IA). Subject to eligibility requirements. Bonus bets are non-withdrawable. In partnership with Kansas Crossing Casino and Hotel. This promotional offer is not available in DC, MS, NY, NV, ON, or PR. Visit BetMGM.com for Terms & Conditions.
21+. Gambling problem? Call 1-800-GAMBLER or 1-800-MY-RESET. Offer available in MI, NJ, PA, WV. Please Gamble Responsibly. Subject to eligibility requirements. Bonus bets are non-withdrawable. In partnership with Kansas Crossing Casino and Hotel. This promotional offer is not available in DC, MS, NY, NV, ON, or PR. Visit BetMGM.com for Terms & Conditions.
